hibernate操作步驟（代碼部分）

知識 06-13

1.載入hibernate的核心配置文件

2.創建SessionFactory對象

3.使用SessionFactory創建Session對象

4.開啟事務（手動開啟）

5.寫具體邏輯crud，增刪改查操作

6.提交事物

7.關閉資源

代碼如下：

1 package com.hui.hibernate;
2
3 import org.hibernate.Session;
4 import org.hibernate.SessionFactory;
5 import org.hibernate.Transaction;
6 import org.hibernate.cfg.Configuration;
7 import org.junit.Test;
8
9 public class HibernateDemo01 {
10
11 public static void main(String[] args) {
12 add;
13
14 }
15
16 @SuppressWarnings("deprecation")
17 @Test
18 public static void add {
19 // 1.載入hibernate的核心配置文件
20 Configuration con = new Configuration;//載入配置文件的對象，在src下找到hibernate.cfg.xml文件放到對象中
21 con.configure;//開始載入
22 //
23 // 2.創建SessionFactory對象,讀取核心配置文件內容創建SessionFactory，根據映射關係創建表
24 SessionFactory sf = con.buildSessionFactory;
25 // 3.使用SessionFactory創建Session對象
26 //類似於連接
27 Session se = sf.openSession;
28 // 4.開啟事務（手動開啟）
29 Transaction tr = se.beginTransaction;
30 // 5.寫具體邏輯crud，增刪改查操作,操作實體類對象
31 User u = new User;//uid不用設置值，他為自增長的主鍵
32 u.setUsername("劉冬冬");
33 u.setPassword("123456");
34 u.setAddress("中國陝西");
35 //調用Session方法save完成操作
36 se.save(u);
37
38 // 6.提交事物
39 tr.commit;
40 // 7.關閉資源
41 se.close;
42 sf.close;
43
44 }
45
46 }

8.測試，運行報錯

報的錯誤如下

log4j:WARN No appenders could be found for logger (org.jboss.logging).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" org.hibernate.InvalidMappingException: Unable to read XML
at org.hibernate.internal.util.xml.MappingReader.legacyReadMappingDocument(MappingReader.java:375)
at org.hibernate.internal.util.xml.MappingReader.readMappingDocument(MappingReader.java:304)
at org.hibernate.cfg.Configuration.add(Configuration.java:518)
at org.hibernate.cfg.Configuration.add(Configuration.java:514)
at org.hibernate.cfg.Configuration.add(Configuration.java:688)
at org.hibernate.cfg.Configuration.addResource(Configuration.java:771)
at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:2257)
at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:2229)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2209)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2162)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2077)
at org.hibernate.cfg.Configuration.configure(Configuration.java:2056)
at com.hui.hibernate.HibernateDemo01.add(HibernateDemo01.java:21)
at com.hui.hibernate.HibernateDemo01.main(HibernateDemo01.java:12)
Caused by: org.xml.sax.SAXParseException; lineNumber: 22; columnNumber: 40; 必須為元素類型 "id" 聲明屬性 "colnum"。
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:203)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:134)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:396)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:327)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:284)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.addDTDDefaultAttrsAndValidate(XMLDTDValidator.java:1253)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleStartElement(XMLDTDValidator.java:1917)
at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.startElement(XMLDTDValidator.java:742)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:380)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2787)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:606)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:118)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:510)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:848)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:777)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:141)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1213)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:643)
at org.dom4j.io.SAXReader.read(SAXReader.java:465)
at org.hibernate.internal.util.xml.MappingReader.legacyReadMappingDocument(MappingReader.java:325)
... 13 more